this is the final product simple effective and works very well. I can supply the full kit either in flat pack or assembled ready to go for £89 plus postage. If within the UK should not be more than £3.99 to £5 depending on who I use to dispatch, other countries please ask. !
I paint the glass with water soluble paint, then wash it off on completion.1_1551112268270_trial new jig-1.jpg

I am happy to charge £20 for postage to the USA and if it's more I'll cover that so trying to make it as economical as possible, however the raw materials including the step motor are not cheap.
If anyone would like to place an order I can ship within the week. please state if you want flat pack build it yourself of ready to run. with the minimum of fitting.
Thanks. Tug

OK they are now ready for ordering, the length has been adjusted to cover most items you would ever need to etch on a round surface.
I can supply them flat packed or assembled.
Flat packed will cost you £86 or $ 112 plus postage from what ever country your in please ask.
Assembled will be £93 or $122 plus the postage as above.
Dispatch will be within two weeks from order, delivery is out of my hands so depends on your location.
if there is anything else you would like to know please either post here or email me at: tugwilson206@gmail.com.
Thanks for looking.

these pictures show the parts involved except the step motor which I am awaiting delivery of, you have everything you need to have a simple inexpensive unit for etching tubes, glasses , flask's and many more items.

@smokeman I have not seen any unit that can tilt as the bottle changes distance from focal point, I'm afraid mine does not either, any work I do on a bottle like that is usually confined in size the what ever the level area is, so what i'm say is, no it cannot tilt so keep the design size to enable the focus to remain, having said that a little slop has never given any problems so a slightly curved tumbler usually comes out ok.

@Gand' I am well aware of 'open source' and have submitted items for it but in this event I have designed and offering a complete working unit for sale, and as far as I know there are no manufacturers willing to give away the plans/designs for nothing even if they agreed to part with them. so although I understand your comment cannot see how it apply's to this occasion.